while importing the sales order via FBDI template for CTO item we are getting an unknown error

Hi team,

while importing the sales order via FBDI template for CTO item we are getting an unknown error

the scenario is when the freeze price is Yes and Freeze tax is No

Below is the error we are getting

Order management did not import source order SRCTXNIDCREATE_0135 because of the following error: An order was not created due to an unknown error. null.
Number of orders that were imported: 0. Check the run time user interface for processing status.
Number of orders that did not pass validation: 1. Some of these orders may be available in the order entry user interface.